If you were in an accident or had a health situation, do you have a way for first responders to find your emergency contact or know important particulars about your medical history? If you don’t wear a medical-alert bracelet, you can have your phone handle the job of communicating life-saving information when you can’t do it, thanks to the category of “ICE” apps — ICE, short for In Case of Emergency.

The Health app, first introduced in in iOS 8, let you record and track your personal and health and fitness data. But even if you never look at the built-in step counter or share your calorie intake privately with your phone, you can use the handy Medical ID screen.

You can get to Medical ID by opening the Health app and tapping the Medical ID tab. The screen is sort of like an electronic medical-alert bracelet. You can list any major health conditions, medications you’re allergic to, your blood type and the phone number for your emergency-contact person.

Even if you have a passcode on your phone, someone can see your Medical ID info by tapping the Lock Screen, tapping Emergency and then tapping Medical ID. Granted, if you have privacy issues with any of this, don’t use it, but it can be helpful if you are unable to respond to an EMT or police officer.

While pure Android currently doesn’t have a built-in health app, you can find similar free or inexpensive medical ID apps in the Google Play store, like the $4 ICE for Android or the free iMedAlert app (which can even issue a GPS-based distress call). Android apps have a woolier reputation for security and privacy, however, so check the specifications to make sure any app you’re looking at doesn’t get grabby with permissions or store your data on their servers.

If you don’t want to fiddle around with a separate app, there’s a basic hack you can do with just about any modern smartphone. Simply call up the Notes app that came with your phone (or any other word-processing app) and type out any emergency information you would want any first responder to know. Next, take a screenshot of that completed text and set the image as your phone’s lock screen image. Anybody who finds you (and your phone) can see the information — and as a bonus, the person would not have to know how to get to the iPhone’s Medical ID screen.

Again, if you have privacy reservations wth any of this, don’t use an app and get a medical-alert bracelet if you do have any conditions you need to identify. But if you just want to add the information to your phone where you already have so much of your life recorded anyway, it could just save your life.